I have a NPN transistor in emitter follower config loaded by a resistor to the negative rail idling at about 100mA. The circuit runs on dual supply, and the emitter follower is further wrapped in the feedback loop of an opamp.

I decoupled the opamp with a single small cap between the rails, and currently have a 100uF electrolytic from collector to ground, another 100uF from the negative rail to ground close to the "cathode resistor".

Intuition tells me that since the emitter follower output stage is running single ended class a, I would just need to decouple from collector to the other side of the resistor. But since its not drawing constant current, I am not so sure.

I would greatly appreciate any comments on how to best decouple the current circuit.